Quantitative Performance Assessment and Rational Design of Reducing Materials for Water Treatment

韩国卫生与科学大学有许多基于颗粒材料的已建立和新兴的水处理技术，通过还原去除污染物。这些技术包括从可降解地下水中氯化溶剂的金属铁活性屏障到可从饮用水中去除砷的含氧化铁过滤器。正在进行的努力正在推动这些技术在各个方面的发展，主要是通过对普通污染物的新型还原材料的特别测试或对普通还原材料的新型污染物的测试。然而，目前还没有任何通用的度量标准或模型可以用来利用这些技术的共同特征来推进这些技术。这些工具将促进工艺优化，并能够进行定量性能评估，以比较竞争替代品或合理设计新的减少材料。该项目旨在通过开发一种灵活、定量和强大的诊断方法来表征水处理系统中使用的所有类型的颗粒还原材料的反应性，从而填补这一空白。该项目的一部分内容将涉及使用各种可能有用的还原颗粒材料（颗粒金属、金属氧化物、金属硫化物等）测量传统实验规模反应器中的污染物降解情况。然而，大部分的实验工作将集中在开发先进的电化学方法来表征材料，基于一种新开发的方法，将颗粒形成电极。通过这种电化学方法获得的结果将被应用于更好地理解控制水处理还原性材料性能的基本过程，并为定量模型提供数据，用于预测尚未测试的新材料的性能。利用这些模型所作的初步预测将通过实验进行检验，以验证这些模型并证明它们的实际效用。获得清洁水需要去除各种污染物的方法，该项目旨在改进目前可用的水处理方法。本项目的重点是化学污染物，但正在研究的处理方法也可以用于控制其他类型的污染物，如致病菌、病毒等。除了确定用于水处理的新型/更好的减少材料，以及开发用于水处理材料的识别和优化的系统方法之外，该项目还将与水处理行业专业人员的培训计划建立新的合作伙伴关系，以最大限度地发挥本项目和未来研发项目的影响。这个奖项是由国家科学基金会共同资助的。国际和综合活动办公室。

CBET 1333476Paul G. TratnyekOregon Health & Science UniversityThere are many established and emerging water treatment technologies based on granular materials that remove contaminants by reduction. These technologies range from reactive barriers of iron metal that degrade chlorinated solvents in groundwater to filters containing iron oxides that remove arsenic from drinking water. Ongoing efforts are advancing these technologies on all fronts, mostly through ad hoc testing of novel reducing materials on common contaminants or testing of novel contaminants with common reducing materials. However, there are not yet any general metrics or models that can be used to advance these technologies by taking advantage of their common characteristics. Such tools would facilitate process optimization and enable quantitative performance assessment for comparison of competing alternatives or rational design of novel reducing materials. This project aims to fill this gap by developing a flexible, quantitative, and powerful diagnostic approach to characterizing the reactivity of all types of granular reducing materials used in water treatment systems. Part of the project will involve measuring contaminant degradation in conventional bench-scale reactors using a wide variety of potentially useful reducing particulate materials (granular metals, metal oxides, metal sulfides, etc.). However, most of the experimental work will focus on developing advanced electrochemical methods for characterizing the materials based on a newly developed method for forming the particles into electrodes. The results obtained by this electrochemical approach will be applied to better understand the fundamental processes controlling the performance of reducing materials for water treatment and to provide data for quantitative models that can be used to predict the performance of new, as yet untested, materials. Preliminary predictions made using these models will be tested experimentally to validate the models and demonstrate their practical utility.Access to clean water requires methods to remove a variety of contaminants, and this project aims to improve on the water treatment methods that are currently available. The focus of this project is on chemical contaminants, but the treatment methods under investigation can also serve to control other types of contaminants, such as pathogenic bacteria, viruses, etc. In addition to the identification of new/better reducing materials for water treatment, and the development of systematic methods for identification and optimization of materials for water treatment, this project also will initiate a novel partnership with training programs for water treatment industry professionals to maximize the impacts of this and future research and development projects.This award is being co-funded by NSF?s Office of International and Integrative Activities.